SAASFoundry
Build Your Product, Not Your Billing System
The open-source infrastructure layer for high-growth SaaS. Authentication, Multi-tenancy, Billing, and AI integrations—setup in minutes, not months.
The Stack
Next.js
TypeScript
Prisma
tRPC
Stripe
Auth.js
Enterprise Auth
MFA, SSO, and Role-Based Access Control (RBAC) ready out of the box. Secure by default.
Multi-Tenancy
Isolated data handling for teams and organizations. Scale from 1 to 100,000 customers safely.
AI-Native
Pre-configured patterns for LLM integration, vector databases, and agentic workflows.
Dogfooding Our Own Tech
We use SAASFoundry to build all our products, including FitJourney and AgentWorkSpace. It's production-proven and battle-tested.